diff --git a/doc/pictures/sot.ico b/doc/pictures/sot.ico
new file mode 100644
index 0000000000000000000000000000000000000000..41b92ef35d150a5f6cf43d6236011e50771e7b79
Binary files /dev/null and b/doc/pictures/sot.ico differ
diff --git a/doc/pictures/sot.png b/doc/pictures/sot.png
new file mode 100644
index 0000000000000000000000000000000000000000..97c731133c27b9b9504294d0b23d169b9ff21faf
Binary files /dev/null and b/doc/pictures/sot.png differ